Romans 14:19So then, let us pursue what leads to peace and to mutual edification.

1 Corinthians 14:4The one who speaks in a tongue edifies himself, but the one who prophesies edifies the church.

1 Corinthians 14:5I wish that all of you could speak in tongues, but I would rather have you prophesy. He who prophesies is greater than one who speaks in tongues, unless he interprets, so that the church may be edified.

is not edified.οἰκοδομεῖται(oikodomeitai)Verb - Present Indicative Middle or Passive - 3rd Person SingularStrong's Greek 3618: From the same as oikodome; to be a house-builder, i.e. Construct or confirm.

(17) For thou verily givest thanks well.--It is here implied that speaking in a tongue was, as regards an individual, an acceptable mode of worship, and it is the public use of it that all throughout this passage the Apostle is dealing with.

Verse 17. - Well. It is good and honourable for thee to utter the voice of Eucharist; but if this be done in the unintelligible tongue, what does the Church profit? The other. The "layman" or "ungifted person."